Assigitcb to busch-sulzer beos



P. HENTSCHKE.

REVERSIBLE coMusIIoN ENGINE.

APPLICATION FILED FEB. 23. |917.

Patented Mar. 9,1920.

2 SHEETS-SHEET I.

gin-uen To:

P. HENTSCHKE.

REVERSIBLE COMBUSTION ENGINE.

APPLICATION FILED FEB. 23| I9I7.

lllllllll IIIIIIIII wn Io z @il c/Q @Hom/w13 urns ENG-INE COMPANY, lt ST. Ivlli inesatto.

Application tiled February 22,

To all 'whom t may concern.'

Be it known that l, Faut HnNTsoHiiu, a subject ci the Emperor of Germanyyand a resident ot tilt.v Louis, Missouri, have invented the Yfollowing-described Improvements in Reversible Cornbustiondilngines'.

rllhe invention is directed particularly to the means for reversing the valve gear of pumping apparatus in internal combustion engines or of other reversible machines whereby it is adapted to either direction ot running, and the object of the invention is more especially to accommodate the scavenger pump ot large size two-cycle marine engines to opposite directions oi engine operation with least complication ot structure and by means ot parts occupying' small. space and not entailing enlargement of the over-all` dimensions of the engine or its crank shatuon which account the principles of the present invention are particularly applicablein reversible engines t'or submarine propulsion. The invention consists broadlyT in the manner oil." application ot a single link eccentric motion to the control of the pump valve frear as explained belovi7 in connection with the illustration of the :torni at present preferred and which is shown in the accomN panyingl drawings; wherein:

Figure l represents a vertical section through the scavenger purnp ot' internal combustion engine with parts in elevation;

Fig. 2 represents a similar View ot the linlr motion ci Fig'. l in diii'erent position;

Fin. 3 is a side elevation et the valve gear and the link motion s viewed from the right hand of Fig. 2 on line IIL-III.

Fig. 4; is a top plan thereof. on line lV-IV The crank shaft marked l is to be understood as representing the main crank shattot a marine internal combustion` engine such for example as a Diesel entrino, the combustion cylinders of which are omitted or concealed liv the pump structure. Clhroun'h its c nnectinrr rod 2 this crank shait drives a dou ble-acting' two-story scavenger pump of which the two pistons are marked 3 and the pump cylinders 4. This pump mechanism is ordinary in principle and need not be explained. The several valve ports to the pump cylinders Vare controlled b v a twostory piston valve 5 which rcciprocates in a. valve casing 6 at one side ot the pump cyl Specification of Letters Patent.

l the punie pistons.

.lititented lll/lar. 9, 192i?.

ist?. semi no. icones.

inders and the :function ot which also that ot ordinary pump valves. rlhc said valve is reciprocated by its valve rod 7 from a rocker lever 8 thc latter being lt'ulcrurned by its sleeve 8 on a Vshait bearing` 9 and it Will loe understood that in the operation ot' the said pump valve, appropriate air inlet ports are opened to the suction sides of the two pump pistons for each direction ot their reciprocating movement. These various ports and passages are not completely illustrated in the drawings and do not require description, inasmuch as valve mechanism of any type, Whether reciprocating or oscillatory, may be the subject et control according1 to the principle ci this invention.

In order that the pumpino; apparatus shall .not pump in. a reverse direction on the re` versal ot the direction oit', entrino rotation, the timine' et the valve functions requires to be reversed or shifted with relation to the annular position oi the engine crank shaft, so that in either direction ot running;- the open inlet passages shall always be in communication with the suction side or sides For this purpose the inner arm l0 et the rock lever 8 is pivoted to a sinall block or blocks 'Il slidinpjly contained in the groove or grooves ot au oscillatini; link l2. This link. which in eiiect a lever.' is tulcrumed on a lziearino; at 13 and connected at lito an eccentric strap l5. the latter embracing an eccentric 16 or equivalent member fixed on the engine shaft. Assurnincv the iulcruin 13 to remain in the position indicated in any of the figures of the drawing. itwill he apparent that the rotation oit' the crank shai't and its eccentric will rocl the link '1.9; and therelovroclr the rocker lever 8--l0 and that the lat er will reciprocate the pumo valve 5. further that the anale ci the eccentric can beso located on the crank shaft that the valve uml reciuroccte properly as a pump valvetor the appropriate direction of crank shatt rotation with the parte in the position stated.

The tulcruro .15% ci the liulr l2 is carried on a pair or similar stancliions 17 sleeved to the crank shaft one on each side of theeccentric lo, ioiued at their upper ends bv the cross bolt ccnstitutino said fulcruin i3. and also bv a cross bolt or brace 18 which extends throueh a slot in the link and by still anothercross brace or bolt 19 which is located at the extreme upper ends ot the stanchions. The two stenchions thus constitute e rigid but light supporting structure ,ture nifty be retained firmly in either of its extreme positions, its upper end is connected t0 an oscillating spring plunger device 2O which Vmay be regarded es any suitable rneensfor holding or urging the sai-id structure to its Yextreme position on either side, or for insuring o full throw of the structure to either side with what might be celled o snap action. ln the present cose this snep action device consists of it spring seat 21 carried by trunnions in e bracket 22 lined to the pump structure. The lower end ot the plunger 2O is pivotcd to the cross bolt 19 oit' the stunehiony structure and its other end slides intok and through the trunnioned spring seat 21. The spring` surroundino' the plunger urges it to its distendcd position end thereby presses the linlrsupportingj structure to the lir-.iit of its pernfiitte'd more nient, to right or leit os the cese ine?? be and assists such movement otter the croJ holt 19 posses the line ot centers Vbetween the spring seat trnnnions and the crank shaft. The stenchion structure is shifted by its link 23 which .is connected by n lost motion slot 24 to e crank orio 25 on the rock shaft 9`the saline rock shaft which forms the lulcrum bearing ttor the lever sleeve Sil. This shaft 9, b v ineens of its other erin (Fig. 3) and e link connection 27 (shown in Y dottedlines in l) is connected to o short 28 (top of Fig. l) which .nier bc understood to be the engine reversing-shaft controlling the valves ot' the combustion cylin lors'. The reversal of the engine valves thus7 through these connections und the link lf3 :ritornaticellgi7 throws the etnnchion stincttne iiroin one side to the othei-, swinging it on e con. itrienlly to' the crank shltt on which it is mounted es above described. The .limit to its movement may be prescribed by the onereting linkcohnections 23, 2l, 25, etc., or v some lix'ed member supplied for the pur V pose; ln the movement ot' the link lf2 when shifted troni Vone position to the other' the blocks ll, pivoted tfo` the'end ot' the rocker lever rin 19,l travel relatively throupd the length ofthe link slot or slots to the opposite end thereof, in which position than.Y

on the opposite side ot the 'ul'crnm 13 sothat the erin now receives on oscillation which niej/'be seid to be opposite to that which it receives in the'irst Adescriben position of the lin T rl'he link lf2 also Ferries. withit the eccentrn 1p l5 which in so more ingo', rotates on its eccentric and the entire structure in the case shown, shifts `from en :1n-

30o to one side of `Verticul to un opposite angle otl 50C on the opposite side. B v such change in the relation ot the link to the angular position oitl the eccentric und the position oi the rocker lcrer, thc letter is cuuscd to re iprocul'e its pump vulve in tho suino relition to the crunk shot't is betere und notwithstanding; thc rcrersul ot direction ot the letter, that is to sur` the pump continues to pump the scavenging nir or wlnitcver tluid it operates on in the seine direction :is formerly.

Tvl/vhile the details ot the structure :ibovo described :ire obriouslir subject to ruriulon :wcordingto the opt-ion ot the nunuitocturer. it is preferred to mount tho stonchions on opposite sides oi" the eccentric und join then! by cross bolts or braces :ze obere described. inasmuch :is thereby the eccentric serves to determine their position on thc crunk nbutt and with such construction it .is convenient sind also desirable to torni the link bloei; l2 :is o divided member with opposed internal slots and :iccordingly to torni the blocks 1l in two ports ,ne occupying' oooh ,slot und with the end of the rocker lover erin l0 betweenl them. l is likewise preferred to mount the do.C ibed structure (lircctlr onr the crsnk shzitt which drives the pump .Tnethcr that be the engine crei. I. he lit or n lov shott ond wl n it is mounted ou the enfiino crank slr'lt or; intended to be shown 'in the pre uit mee, iii will be :ipporent that the entire structure is in position to be well lubrientcd :ind that it is likewise reedihv eccessible h x roiuorino the. crunk case side plates, ond it will be il'urlher noted that the entire structuir is not only capable of being' housed conipoctly in the crunk co e but tht it occupies :i eprice oo the crank :`-liaint7 between the pump crunk Sil unda the. shaft bearing which is no wider thun would be requisito it no such structure wei e employed. Consequently it will be plein thot the reversal of the volvo @fearing- :iccoroing to the present invention is eccomplished without extending the oifcr-"ull length oi. the cronl shaft or engine.

Claims:

l.. In :t reversible machine of the hind referred to. the combination n b pump hott pnnip .mechanism (li-"iwV ei-chf., oit :i rerersiblc pinnp vflfc .or comprising :i link connected lo seid more from?. n single eccentric conieetcd to the pump .fhcftt to drive slid link :ind 'incizus i. ch 'ng the onsrnlor position ot seid link rclntirelr to id shaft to ecconunodete seid goor to the reverse rotation the pump shalt.

2. ln e. reversible inochinc et `thc kind referred to. the e -iibinotion with o putnp :1nd volvo, ol o inechine-lrii'en shot'l to operate the shalt for drivingsaid genri11g,seid geen crank sin,

reeenie n@ te the directien of retetien thereof.

lin e reversible niecliine ci? tlie kind ie terred to, tlie ceinlzinetien ivitli pnnip .in eiwit end. pinnp i'neclienisin f iven by l n reversible p innp ifnlve geni.' ci'iniprising :i link nieliien selelv carried by Seid It and e ptcd te l Y eivnng; te dit 'lferent engi ler relations thereon ivliile re taining eperetive centrel elf tlie pump valve, sind single eccentric en seid shelf 'lcr driving seid link inctien during; rete-cien of seid sl'ie't in beth directions.

l. 1n e reversible in irnel cenilinstien engine7 tlie ceinbinetien ivitli en enginedriven pump ineclidnisin el e, reversible pump velve therefor comprising; e Single eccentric, :i link nieniiier cennectiegg` tlie seine te tlie pump valve, :i nlcrnin fer seid link stationery during the retetien oi" snid eccentrica and .ineens :ter changing tlie angular reletien of seid linl inen'iber relatively te the seid eccentric te ecceinniednte reverse engine running.

5. The ceinbinetien in e reversible internel combustion engine 0;? e pump driven irein the en eine crank eliniet end lieviiig1 valve 4neer else epeinted by seid ift end including single eccentric link ineten lievingg; en eccentric en tlie engine crc-.nk slrilit and e link' sind n, :l'nlcrnin ther-eier c during); tlie retzitien el seidieliett, and nlcrnni being; adapted te be s gularly with relelien te seid elicit e tric te reverse seid velve gear en reversel elf the engine.

6. 'lllie combination in e reversible internal ceinlcnstien enfrineu of s pinnp driven iev the engine erenk slini't and having; vnlve deer else operated. by elieft., seid. geen inclnding e sinple eccentric? end n. link motion li evinr e stationary Llnlcrnni nieinber carried ley seid engine crenlr slieit provided with ineens: for swinging it tliei'een te reverse the timing cit the velve function et the nep.

'Z'. The ceinliineticn in r sible inten nel ceinlinstien en i. l: l ine reversing; elicit, e. pump driven by tee engine crenlr shaft having; velve geni? else driven tlnnelejva seid gear inclnding4 en eccentric, link driven tlieielev7 sind e. ifnlcrnin :ter seid link carried cencentricellv te 'the engine cienlr and adapted te lie annuler-ly shifted by the operation et seid en@-ie-reversing slieitt.

8. lin epi etns el? tlie liind erred te the ccinbineticn ci n, valve-operating lever, :i slie'ft cerryingg; en e.icentiic.j c, li iec ine seid, lever end eccentric end ruin ter seid lint; cencentricellv inennted with respect te shaft end adapted te lie swung about tlie seine te reverse the velve timing.

9. 1in apparatus ci? the kind described. e pinnp end its velve, n, single eccentric rneclienisin r'er operating the pump valve, seid slr' wle te reverse the and .ineens acting en seid to iinpnrt e, snep action te the i tliereei.

the llind described. the li :in ene'ine erenlr elicit? e. i xnfl e pinnp valve, 'ine slielt operating; seid veli/'ej 'the cnereti. eennectiens tliereei n sliiltnlnle link member copervelve rocker lever and inennted en e. en' ci stencliicns, ene out Wliicli is cnr 'ed en tlie enlfne cienk slieit en encli eide et the eccentic thereon.

11. 1n e. reversible nnicliine ci the kind re- /i'red te7 the cenibineticn with e. pump end is velvc end the driven elielt for epereting' ineclieniein being timing; thereof, nieclienisni slii'lti Vrie i i .e letter, er valve gearing between seid eilt and valve including" e linlr, e single eccentric en seid shafter oscillating' 'the link, n lfnlci'nin ennpert 'lier the link mounted cencentricellv ivitli the elie'ft, and reversing; ineens :tor shifting die inlernin support end link.

1:2. The ccnibinetien in e reversible internel combustion enfrine ci e pump driven b v the engine crank elm it end having valve ldeer else epereted bv seid elicit, seid 5deer include single eccentric en the slieit, e linlr operated bv :seid eccentric, e 'lnlcrnin snppert 'ler the link pivotnllv inennted nnen the elicit. end ineens for swinging; seid fulcrnm Supt-eert .find with it the linlc te reverse the timing' ei' the valve function elf the pump.

,lin epperntne ci tlie liind referred to., tlie cerebinetien of n vnli'fe-enereting inemlier lievinp; e bleek., e. slielft carrying); an cccentricnl e link cpereted bv seid eccentric end having); n channel engaging; seid block, e ifnlcrnni snpner lcr tlie link concentricnllv inennted ivitiliv respect te seid elinit and adapted te be eivnnn; about tlie seine to reverse tlie velve timing and snep-ever mechenisin cennected with seid tnlcrlnn support.

1.4i.. 1n e reversible inecliine tlie combinetien with interv shalt and e reciprocating red driven tlierebn ci? e reversible neer fer mid/red comprising? n linlr, e 'lfnlcr'nin thereter eteti v during; tlie rotation of seid elif-.Lft r nd ineens 55C-r nicvinp; seid fnlcrnni te niccei lridete tlie rev sel et reinticn et the Shelli; sind en eccen'tr c en slieit driving seid, linl.

15. ln e Vrevei'eible nnicliind the combinetien ivitli ine cliine driven elieit end valve operated ltliereliv, el? e, reversible valve gearl fer seid velve comprising i link, e -fuleiinn tlnrc-elferV stationery during; the reteu f en er" seid eliziiit end ineens ier n'ievine1 seid in in ecceininedete seid valve tc 'the eric driven link.

16. ln neif'ereible rneclnne el the kind re- :tferred te, the combination with e pump and ric its Valve, of a, machine driven shaft, en eccentric thereon to operate said Valve, and valve gearing` between said eccentric and valve including a, link and a ulcrum for vsaid link stationary during the rotation of said shaft, said link bein g subject to change of angular relation with respect to said shaft corresponding to the direction of rotation thereof.

17. ln e4 reversible machine of the kind referred no7 the combination with a pump crank Shaft and pump mechanism driven by it, of a reversible pump vulve geur comprising)` n link and n 'nlcrum for Suid link carried by Suid crunk shaft und stationary during the rotation thereof, sani link being :adapted ro be swung to different angular positions on said Shzrft While retaining operative control of the pump valve7 und :Ln eccentric on Suid shaft io drive Jhe link.

In testimony whereof l have signed this specification.

PAUL HENTSGI'HSIG. 

